Mechanical movement.



No. 748,024. PATENTED DE0429, 190s.

s. 1). STEVENS. 'MEOHANIGAL MOVEMENT.

APPLICATION FILED APR. 2. 1903. NO MODEL.

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PATENTED DEC. 29, 1903.

S. D. STEVENS. MECHANICAL MOVEMENT.

APPLICATION FILED APR. 2. 1903.

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Patented December 29, 1903.

PATENT OFFICE.

SAMUEL DAVID STEVENS, OF CHANDLER, TEXAS.

MECHANICAL MOVEMENT.

SPECIFICATION formingpart of Letters Patent No. 748,024, dated December 29, 1903.

' Application filed April 2, 1903- Serial No. 150,838. (No model.)

To all whom it may concern."

Be it known thatLSAMUEL DAVID STEVENS, a citizen of the United States, residing at Chandler, in the county of Henderson and State of Texas, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a specification.

My invention relates to animprovemeut in mechanical movements.

The object of my invention is to produce an apparatus for multiplying power. I have constructed such an apparatus employing a plurality of connected levers pivoted "to a frame and adapted to multiply the power generated by a balance-pulley mounted on the upper'part of the frame and transmit the same through the levers to a pair of bandpulleys carried on the base of the said frame.

My invention is more especially designed for use in connection with sawmills, gins, and the like; but it may be used in various manners.

Finally, my invention has for its object the provision of an apparatus that will be strong, durable, and eflicient and comparatively simple and inexpensive to construct.

.With the above and other objects in view construction and operation, a-preferable embodiment of which is described and illustrated in the accompanying specification and drawings, wherein- Figure l is a side elevation of the apparatus, showing the levers in two of their-posi tions. Fig. 2 is a transverse sectional view taken on the line a: at of Fig. 1. Fig. 3 is a front elevation, and Fig. 4 is a rear elevation. In the drawings the numeral 1 designates the frame, which comprises the standards 2, 3, and 4, connected at their bases by sillblocks 5 and braced by bars 6, placed intermediate their ends. The standards are capped by longitudinal bars 7, which brace their upper ends. Between the standards 2 a balance-wheel Sis mounted upon a shaft 9, passing through the standards. CrankslO are keyed to the outer ends of the shaft and project at approximately right angles thereto, but from opposite sides of the said shaft. Long levers 11 are connected to the cranks by wrist-pins 12, which slide in the elongated slots 13, provided in the ends of the levers, and the said levers are pivoted to the standards 4 upon pins 14. It might be here stated that the levers for multiplying the power are provided on both sides of the frame, and the long levers 11 being connected to the oppositely-disposed cranks it will be readily seen that the levers will move in opposite directions, thereby causing the lovers on one side of the frame to be at the limit of their upward stroke when the levers on the opposite sideare at the limit of their downward stroke.

Arranged on each side of the frame are a plurality of levers 15, pivoted alternately to the standards 3 and 4 upon pins 16. The levers are pivotally connected in pairs by links 17, each lever being connected to the lever aboveat one end and to the lever below at the other end. The links 17 and the levers 15 are pivoted together by pins 18, and the rear ends of the uppermost levers 15 are connected to the long levers 11 also by the links 17 and pins 18. Operating-arms 19, connected to the levers 15 by the links 17, are journaled upon the ends of a shaft 20, mounted in bearings 21, secured upon the side rails 22, which latter are supported upon the standards 2, 3, and 4. The shaft 20 carriesa pair of fixed ratchet-wheels 23, which are rotated by pawls 24, pivoted upon the inner faces of the arms 19. Keyed upon the shaft 20 is a gear 25, which meshes with a pinion 26, fixed upon a second shaft 27, mounted in bearings 28, secured on the side rails 22 in front of the shaft 20.

The shaft 27 supports upon its outer ends a pair of pulleys 29, which may be connected in any suitable manner with the machine or apparatus to which power is to be furnished. One of the pulleys 29 may be used as a fiywheel to balance the shaft 27.

The operation of the apparatus is as follows: Motion beingimparted to the balance pulley or Wheel 8 by any suitable engine or power means, the cranks 10 are rotated, which in turn swing the long levers 11, the wrist-pins 12 sliding in the slots 13. As before stated, the cranks are oppositely disposed Thus one of the long levers will be swung downwardly while the other is being swung upwardly, and the levers 15, being connected to the long levers 11, will be swung upon their pivot-pins 16, the levers upon the opposite sides of the frame moving or swinging in opposite directions.

From the foregoing it will be evident that such alternate swinging will be imparted to the arms 19 through the links 17, one of the arms 19 swinging upwardly and causing its pawl 24 to slip over the teeth of the ratchetwheel 23, and at the limit of its upward movement the pawl 24 catches on one of the rachet-teeth, while the other arm 19, having gone through the operation of the first-named arm and swinging downwardly, rotates the ratchet-wheel 23. Thus it will be readily understood that a continuous rotation of the shaft 20 will be maintained through the alternate movement of the pawls. The gear 25, being keyed to the shaft 20 and meshing with the pinion 26, rotates the latter, which causes the pulleys 29, carried on the pinionshaft 27, to be rotated at a high rate of speed.

It is easily seen that a small force applied to the pulley 8 will be multiplied by the levers and arms and through the pawls and ratchets and gears, so that when it reaches the pulleys its magnitude will be greatly increased, and such power may be utilized to operate machinery which would otherwise require powerful operating means.

I do not wish to limit my invention to the exact details of construction and operation herein set forth, as I may make various changes in the same without departing from the spirit of my invention.

Having fully described my invention, what I claim to be new and useful, and desire to secure by Letters Patent, is

1. In an apparatus of the character described, a frame, a plurality of levers swingingly mounted on the frame, a power-wheel mounted on theframe, a shaft supporting the power-wheel, cranks carried on the shaft and connected to the levers, swinging arms connected to the levers, a shaft having the arms journaled thereon, ratchet-wheels fixed on the shaft, pawls carried by the arms and'engaging the ratchet-wheels, agear mounted on the shaft, a pinion meshing the gear, and a pulley mounted on the shaft carrying the pinion, substantially as described.

2. In an apparatus of the character described, the combination with a plurality of pivoted levers, the pivots of the levers being alternately arranged adjacent the opposite ends thereof, links pivoted to the ends of the levers, said links being alternately arranged and each engaging tWo successive levers, means for imparting movement to said levers, and means for transmitting power generated by the levers.

3. The combination with a plurality of levers alternately pivoted at points adjacent their opposite ends, alternately arranged links each pivoted to the ends of two lovers, means connected with, the free end of one end lever for actuating the same, and means connected to the other end lever for transmitting the power generated by the levers.

In testimony whereof I affix my signature in presence of two witnesses.

SAMUEL DAVID STEVENS.

Witnesses:

GEo. P. HUGHES, CHARLES R. YARBROUGH. 

